/* Cardicom-inspired visual system for Quiz App */

:root {
    --bg: #f4f7fb;
    --bg-alt: #eef4fb;
    --surface: rgba(255, 255, 255, 0.92);
    --surface-strong: #ffffff;
    --border: rgba(18, 53, 90, 0.12);
    --border-strong: rgba(18, 53, 90, 0.18);
    --text: #0d2142;
    --text-muted: #5f718c;
    --text-soft: #7f91ab;
    --primary: #2f8f4e;
    --primary-dark: #1f6f39;
    --primary-soft: #e8f6ec;
    --secondary: #154c29;
    --accent: #f59e0b;
    --accent-soft: #fff3d8;
    --success: #1f8a4c;
    --success-soft: #e8f7ef;
    --danger: #c2410c;
    --danger-soft: #ffede3;
    --shadow: 0 14px 40px rgba(14, 38, 74, 0.08);
    --shadow-sm: 0 6px 20px rgba(14, 38, 74, 0.06);
    --radius: 18px;
    --radius-sm: 12px;
    --max-width: 1180px;
    --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    color: var(--text);
    line-height: 1.55;
    background:
        radial-gradient(circle at top left, rgba(47, 143, 78, 0.14), transparent 34%),
        radial-gradient(circle at top right, rgba(88, 170, 106, 0.11), transparent 28%),
        linear-gradient(180deg, #f7fbf8 0%, var(--bg) 55%, #eef6f0 100%);
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover { color: var(--primary-dark); }

img {
    max-width: 100%;
    display: block;
}

h1, h2, h3, h4, p { margin-top: 0; }

h1 {
    font-size: clamp(2rem, 3.3vw, 3.6rem);
    line-height: 1.03;
    letter-spacing: -0.04em;
    margin-bottom: 0.6rem;
}

h2 {
    font-size: clamp(1.35rem, 1.8vw, 2rem);
    letter-spacing: -0.02em;
    margin-bottom: 0.45rem;
}

h3 {
    font-size: 1.05rem;
    margin-bottom: 0.35rem;
}

p { color: var(--text-muted); }

.text-muted { color: var(--text-muted) !important; }
.text-sm { font-size: 0.9rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem 1.25rem 4rem;
    flex: 1;
}

.nav {
    position: sticky;
    top: 0;
    z-index: 40;
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 18px rgba(18, 53, 90, 0.04);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0.8rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text);
    font-weight: 800;
    letter-spacing: -0.03em;
    font-size: 1.02rem;
}

.nav-brand span {
    white-space: nowrap;
}

.nav-brand:hover { color: var(--secondary); text-decoration: none; }

.brand-logo {
    width: 6.2rem;
    height: 4.2rem;
    object-fit: fill;
    border-radius: 0.75rem;
    background: white;
    border: 1px solid var(--border);
    box-shadow: 0 10px 18px rgba(47, 143, 78, 0.14);
    padding: 0.18rem;
}

.brand-icon {
    width: 2.25rem;
    height: 2.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    color: white;
    box-shadow: 0 10px 18px rgba(47, 143, 78, 0.22);
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0;
    margin: 0;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-links li { display: flex; align-items: center; }

.nav-links a,
.nav-links .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.45rem 0.8rem;
    border-radius: 999px;
    color: var(--text-muted);
    font-size: 0.94rem;
    font-weight: 600;
    transition: transform 140ms ease, background 140ms ease, color 140ms ease, box-shadow 140ms ease;
}

.nav-links a:hover,
.nav-links .nav-link:hover {
    background: var(--primary-soft);
    color: var(--primary-dark);
    text-decoration: none;
    transform: translateY(-1px);
}

.nav-links .nav-user {
    color: var(--text-soft);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0 0.5rem;
}

.page-header {
    margin-bottom: 1.25rem;
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    align-items: center;
    font-size: 0.88rem;
    color: var(--text-soft);
    margin-bottom: 0.55rem;
}

.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--primary); text-decoration: none; }
.breadcrumbs .sep { color: rgba(18, 53, 90, 0.35); }

.hero {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 28px;
    background:
        linear-gradient(135deg, rgba(21, 76, 41, 0.98) 0%, rgba(47, 143, 78, 0.94) 58%, rgba(88, 170, 106, 0.84) 100%);
    color: white;
    box-shadow: var(--shadow);
    margin-bottom: 1.4rem;
}

.hero::before,
.hero::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    filter: blur(4px);
}

.hero::before {
    width: 14rem;
    height: 14rem;
    top: -5rem;
    right: -3rem;
}

.hero::after {
    width: 10rem;
    height: 10rem;
    left: -2rem;
    bottom: -3rem;
    opacity: 0.45;
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.95fr);
    gap: 1.5rem;
    padding: clamp(1.5rem, 3vw, 2.6rem);
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.42rem 0.75rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: rgba(255, 255, 255, 0.94);
    font-size: 0.84rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin-bottom: 0.95rem;
}

.hero h1,
.hero h2,
.hero p { color: white; }

.hero p { color: rgba(255, 255, 255, 0.88); max-width: 60ch; }

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.hero-panel {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 24px;
    padding: 1.15rem;
    backdrop-filter: blur(8px);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
}

.hero-panel .panel-stat {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 0.9rem;
}

.hero-kpi {
    border-radius: 18px;
    padding: 0.85rem;
    background: rgba(255, 255, 255, 0.10);
    border: 1px solid rgba(255, 255, 255, 0.14);
}

.hero-kpi .label {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255,255,255,0.78);
}

.hero-kpi .value {
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: white;
    margin-top: 0.15rem;
}

.surface-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.9rem;
}

.surface-heading p { margin-bottom: 0; }

.card,
.subject-card,
.dashboard-subject,
.stat-card,
.auth-card,
.quiz-question,
.result-question,
.result-summary,
.modal-content,
.table-card,
.inline-card {
    background: var(--surface-strong);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.card,
.subject-card,
.dashboard-subject,
.stat-card,
.auth-card,
.quiz-question,
.result-question,
.result-summary,
.table-card,
.inline-card {
    padding: 1.2rem;
}

.card { margin-bottom: 1rem; }

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}

.subject-card,
.dashboard-subject {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    position: relative;
    overflow: hidden;
}

.subject-card::before,
.dashboard-subject::before,
.stat-card::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    height: 4px;
    width: 100%;
    background: linear-gradient(90deg, var(--secondary), var(--primary), var(--accent));
}

.subject-card h2 a,
.dashboard-subject h3,
.subject-card h3 a {
    color: var(--text);
}

.card-meta {
    margin-top: auto;
    font-size: 0.9rem;
    color: var(--text-soft);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-top: 0.35rem;
}

.empty-state {
    text-align: center;
    padding: 2rem 1rem;
}

.empty-state p { margin-bottom: 0.4rem; }

.modal {
    position: fixed;
    inset: 0;
    z-index: 80;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    background: rgba(13, 33, 66, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    width: min(100%, 620px);
    max-height: min(90vh, 820px);
    overflow: auto;
}

.enrollment-list {
    display: grid;
    gap: 0.65rem;
    margin-bottom: 1rem;
}

.enrollment-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.8rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--bg);
    cursor: pointer;
}

.enrollment-row input[type="checkbox"] {
    width: 1.05rem;
    height: 1.05rem;
    accent-color: var(--primary);
}

.student-name {
    font-weight: 600;
    color: var(--text);
}

.stat-card {
    position: relative;
    text-align: left;
}

.stat-value {
    font-size: 2rem;
    line-height: 1;
    font-weight: 800;
    letter-spacing: -0.05em;
    color: var(--secondary);
    margin-top: 0.65rem;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin-top: 0.3rem;
}

.dashboard-grid { margin-bottom: 1rem; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0.72rem 1.05rem;
    font: inherit;
    font-size: 0.94rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none !important;
    transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease, border-color 140ms ease, color 140ms ease;
    white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 10px 22px rgba(47, 143, 78, 0.22);
}

.btn-primary:hover { color: white; box-shadow: 0 14px 24px rgba(47, 143, 78, 0.28); }

.btn-secondary {
    background: white;
    color: var(--secondary);
    border-color: rgba(47, 143, 78, 0.16);
}

.btn-secondary:hover { background: #f7faff; color: var(--secondary); }

.btn-danger {
    background: var(--danger-soft);
    color: #9a3412;
    border-color: rgba(194, 65, 12, 0.18);
}

.btn-danger:hover { background: #ffe2d3; color: #7c2d12; }

.btn-sm { padding: 0.48rem 0.78rem; font-size: 0.84rem; }

@media (max-width: 720px) {
    .actions .btn,
    .form-actions .btn,
    .inline-form .btn {
        width: 100%;
    }

    .actions,
    .form-actions,
    .inline-form form {
        width: 100%;
    }
}

.inline-form {
    display: flex;
    align-items: stretch;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.inline-form form {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    flex-wrap: wrap;
    flex: 1;
    width: 100%;
}

.inline-form input,
.inline-form select {
    flex: 1 1 220px;
    min-width: 180px;
}

.inline-form .btn {
    flex: 0 0 auto;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

label {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text);
}

input,
textarea,
select {
    width: 100%;
    border: 1px solid rgba(18, 53, 90, 0.16);
    border-radius: 14px;
    padding: 0.84rem 0.95rem;
    background: white;
    color: var(--text);
    font: inherit;
    box-shadow: inset 0 1px 2px rgba(18, 53, 90, 0.03);
    transition: border-color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: rgba(47, 143, 78, 0.65);
    box-shadow: 0 0 0 4px rgba(47, 143, 78, 0.12);
}

textarea { resize: vertical; }

.form-hint {
    margin: 0;
    font-size: 0.84rem;
    color: var(--text-soft);
}

.form-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: flex-end;
    margin-top: 1rem;
}

.inline-card .form-actions,
.modal-content .form-actions {
    justify-content: flex-end;
}

.alert {
    border-radius: 16px;
    padding: 0.95rem 1rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
}

.alert-error {
    background: var(--danger-soft);
    border-color: rgba(194, 65, 12, 0.14);
    color: #9a3412;
}

.alert-success {
    background: var(--success-soft);
    border-color: rgba(31, 138, 76, 0.14);
    color: #17603a;
}

.auth-page {
    min-height: calc(100vh - 120px);
    display: grid;
    place-items: center;
    padding: 1rem 0;
}

.auth-card {
    width: min(100%, 450px);
}

.auth-card h1 { margin-bottom: 0.4rem; }
.auth-card .subtitle { margin-bottom: 1.1rem; }
.auth-footer {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.table-card,
.card[style*="padding:0"] {
    overflow: hidden;
    padding: 0;
}

.table-card table {
    margin: 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

thead th {
    text-align: left;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-soft);
    background: #f7faff;
    border-bottom: 1px solid var(--border);
    padding: 0.95rem 1rem;
}

tbody td {
    border-bottom: 1px solid rgba(18, 53, 90, 0.08);
    padding: 1rem;
    vertical-align: top;
}

tbody tr:hover { background: #fbfdff; }

tbody tr:last-child td { border-bottom: none; }

.actions {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    flex-wrap: wrap;
    justify-content: flex-start;
}

.actions .btn,
.form-actions .btn {
    min-height: 2.55rem;
}

.quiz-question,
.result-question {
    margin-bottom: 1rem;
}

.q-header {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: start;
    margin-bottom: 0.9rem;
}

.q-type-badge,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.38rem 0.65rem;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.q-text,
.rq-text {
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--text);
}

.q-points {
    flex-shrink: 0;
    padding: 0.36rem 0.6rem;
    border-radius: 999px;
    background: #f4f8ff;
    color: var(--secondary);
    font-size: 0.84rem;
    font-weight: 700;
}

.question-choices,
.tf-options {
    display: grid;
    gap: 0.75rem;
}

.question-choices label,
.tf-options label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.8rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: #fbfcff;
    cursor: pointer;
    color: var(--text);
    transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.question-choices label:hover,
.tf-options label:hover {
    background: var(--primary-soft);
    border-color: rgba(47, 143, 78, 0.22);
    transform: translateY(-1px);
}

.question-choices input,
.tf-options input {
    width: auto;
    margin: 0;
    accent-color: var(--primary);
}

.choice-section { display: flex; flex-direction: column; gap: 0.75rem; }
.choice-row {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0.75rem;
    align-items: center;
}
.choice-row + .choice-row { margin-top: 0.7rem; }

.choice-row input[type="checkbox"] { width: 1.05rem; height: 1.05rem; accent-color: var(--primary); }

.result-summary {
    text-align: center;
    padding: 1.5rem;
    background:
        radial-gradient(circle at top right, rgba(47, 143, 78, 0.08), transparent 28%),
        white;
}

.result-summary .score {
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 900;
    letter-spacing: -0.06em;
    line-height: 1;
    margin-bottom: 0.35rem;
}

.result-summary .detail {
    font-size: 1rem;
    color: var(--text-muted);
}

.pass { color: var(--success); }
.fail { color: var(--danger); }

.correct-text { color: var(--success); font-weight: 700; }
.incorrect-text { color: var(--danger); font-weight: 700; }

.rq-answer {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    align-items: center;
    margin-top: 0.5rem;
}

.rq-answer .label {
    color: var(--text-soft);
    font-size: 0.9rem;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(9, 18, 34, 0.42);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 50;
}

.modal-content {
    width: min(100%, 540px);
    padding: 1.4rem;
    background: white;
}

.centered-cta {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.feature-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem 1rem;
    margin-top: 1rem;
    color: rgba(255, 255, 255, 0.92);
    font-weight: 600;
}

.feature-strip span::before {
    content: "•";
    color: rgba(255, 255, 255, 0.72);
    margin-right: 0.55rem;
}

.utility-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.36rem 0.7rem;
    border-radius: 999px;
    background: var(--accent-soft);
    color: #9a5d00;
    font-weight: 700;
    font-size: 0.84rem;
}

.callout {
    background: linear-gradient(135deg, #f8fbff, #eef5ff);
    border: 1px solid rgba(47, 143, 78, 0.12);
    border-radius: 22px;
    padding: 1.2rem;
}

hr { border: 0; border-top: 1px solid var(--border); margin: 1rem 0; }

@media (max-width: 860px) {
    .nav-inner,
    .hero-inner,
    .surface-heading {
        grid-template-columns: 1fr;
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-inner { align-items: flex-start; }
    .nav-links { justify-content: flex-start; }
    .hero-inner { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .main { padding: 1rem 0.9rem 3rem; }
    .nav-inner { padding: 0.85rem 0.9rem; }
    .card,
    .subject-card,
    .dashboard-subject,
    .stat-card,
    .auth-card,
    .quiz-question,
    .result-question,
    .result-summary,
    .modal-content,
    .inline-card {
        padding: 1rem;
    }

    .hero-inner { padding: 1.1rem; }
    .hero-panel .panel-stat { grid-template-columns: 1fr; }
    .q-header { flex-direction: column; }
    .choice-row { grid-template-columns: auto 1fr; }
    .choice-row button { grid-column: 2; justify-self: start; }
}